In article ,
says...

"Dave Doe" wrote in message a.


b.
You are referring to the bouyancy ballast tanks - diphead!
That is
*not* "the ballast". Equivalent to a diver's BCD.


diphead? My my, getting a bit testy, are we?



c.
Without the ballast at the bottom of a sub (as said, I believe
it will
be Lead (or DU for modern war subs)), OR the construction
itself -
producing a vessel that is denser than water (mass/volume) -
the sub
will not sink!


Oh, right, I keep forgetting, water weighs zero in Doe Doe land.

And in water - given weight = a force (not mass - as many folk make this
false assumption).

Must be happy sailing in Doe Doe land Diphead. Don't fall in the water
though, in Doe Doe land you'll fall straight to the bottom.

--
Duncan

"Dave Doe" wrote in message
diphead? My my, getting a bit testy, are we?



Must be happy sailing in Doe Doe land Diphead. Don't fall in
the water
though, in Doe Doe land you'll fall straight to the bottom.


What's that saying about the first one in an argument to call
names?

SBV